By employing the general expression of temperature $T_{ h}=|\kappa|/2\pi = \frac{ 1}{ 2\pi \tilde{ r}_{ A}}(1-\frac{ \dot{ \tilde{ r}}_{ A}}{ 2H\tilde{ r}_{ A}})$ associated with the apparent horizon of a FRW universe and assuming a region of FRW universe enclosed by the apparent horizon as a thermal system in equilibrium, we are able to show that the generalized second law of thermodynamics holds in Gauss-Bonnet gravity and in more general Lovelock gravity.
Categories: gr-qc